CVE-2026-73484: Flowise before 3.1.3 Sandbox Escape via Pandas Methods

Severity: high (CVSS 8.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-08-13 · updated 2026-10-24
Weakness: CWE-184

Description

Flowise before 3.1.3 contains a sandbox escape vulnerability in pythonCodeValidator.ts that fails to block native Pandas DataFrame methods like to_csv, to_json, pipe, and query. Authenticated attackers can exploit this to exfiltrate uploaded CSV data or write arbitrary files to the server filesystem.

Affected products

FlowiseAI Flowise: before 3.1.3 — fixed in 3.1.3

How to fix

Upgrade to a fixed version: FlowiseAI Flowise 3.1.3. Check the vendor advisory for mitigations.

References

https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-x58f-9m57-qc4m
https://www.vulncheck.com/advisories/flowise-before-sandbox-escape-via-pandas-methods
https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-x58f-9m57-qc4m

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